The Lost Mission

Not to be confused with Lost episode (disambiguation), The Lost Levels, or the PSX Doom: The Lost Levels (add-on to the PlayStation Doom TC). The Lost Mission is the second official Doom 3 expansion pack, released in as part of Doom 3: BFG Edition. It consists of eight new levels during which the player takes control of a surviving member of the marine squad Bravo Team, which the hero of the original campaign was meant to rejoin. The primary objective, given to the marine by Dr. Richard Meyers, is to shut down a high-powered long-range teleporter in the top secret Exis Labs in order to prevent the demons from using it to reach Earth. The levels feature a mixture of weapons and monsters from Doom 3 and the previous expansion, Resurrection of Evil.

Levels

 * Enpro Sector 1
 * Enpro Sector 2
 * Underground (Part 1)
 * Underground (Part 2)
 * Exis Labs (Part 1)
 * Exis Labs (Part 2)
 * Hell
 * Hell Outpost

Weapons
Most of the weapons from Doom 3 and Resurrection of Evil return in The Lost Mission, except for the chainsaw and the Artifact. The Soul Cube is not present in the campaign except when playing on Nightmare difficulty, in which case it is available from the start, but it plays no part in the story.

Enemies
The game does not include any new enemies, although most of the enemies from Doom 3 and Resurrection of Evil return except for ticks, lost souls, vulgars, several variants of zombie (notably chainsaw zombies), and most of the bosses. The final boss is another Guardian of Hell, although it behaves differently from the encounter in the original Doom 3 - it is not blind and does not use seekers, but it can be targeted and damaged normally, whereas the original Guardian could only be harmed by attacking its blue glowing orb. Furthermore, it has a new attack in which it launches several projectiles in series towards its target.